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101.
E. G. Petrov A. Marchenko O. L. Kapitanchuk N. Katsonis D. Fichou 《Molecular Crystals and Liquid Crystals》2014,589(1):3-17
The conductance properties of 1,3-(trimethylsilyl)-1-tridecene-6,12-diyne, a non-conjugated trimethylsil-acetylene molecule have been investigated both experimentally and theoretically. Based on scanning tunnelling spectroscopy experiments, a discussion on the mechanisms controlling the charge transfer through this linear molecule is carried out. A specific property of the studied molecule is that it contains localized molecular orbitals. The shifts of the MOs energy levels caused by the applied voltage as well as a distant superexchange coupling between the respective localized MOs are shown to become determining in the formation of a nonlinear hole current through the molecule. 相似文献
102.
V. I. Marchenko 《Journal of Experimental and Theoretical Physics》2000,90(5):905-907
The physical idea of the natural origin of diseases and deaths has been presented. The fundamental microscopical reason is the destruction of any metastable state by thermal activation of a nucleus of a irreversible change. On the basis of this idea the quantitative theory of age dependence of the death probability has been constructed. The obtained simple Death Laws are very accurately fulfilled almost for all known diseases. 相似文献
103.
Lutskii A. E. Marchenko T. N. Poltoratskaya I. A. Gordienko V. G. 《Theoretical and Experimental Chemistry》1977,12(2):178-181
Theoretical and Experimental Chemistry - 相似文献
104.
A. P. Avdeenko S. A. Konovalova D. A. Roman’kov O. N. Ludchenko I. L. Marchenko 《Russian Journal of Organic Chemistry》2009,45(3):383-393
Reactions of N-aroyl-, N-arylsulfonyl-, and N-(N-arylsulfonylbenzimidoyl)-2,5-dialkyl-1,4-benzoquinone imines with sodium arenesulfinates in acetic acid gave the corresponding 1,4-, 6,1-, and 1,6-addition products. Variation of the size and donor power of substituents in positions 2 and 5 of the quinoid ring almost does not affect the ratio of the addition products, which is determined mainly by the nature of substituent on the nitrogen atom. 相似文献
105.
Anatoliy Marchenko 《Tetrahedron》2010,66(21):3668-7758
C-Phosphorylated (PV) arylformamidines have been prepared by the reaction of N-arylamidotrichloromethyl derivatives of phosphorus, thiophosphorus, and selenophosphorus acids with secondary amines. Dependence of the reaction on the nature of chalcogene, electronic and steric factors has been studied. By reduction of N-arylformamidinophosphonoselenides the corresponding C-phosphorylated (PIII) arylformamidines have been synthesized. 相似文献
106.
It is shown that the spectrum of the bulk excitations in helium II, which ends at the Pitaevskii point, should be recovered at a certain critical point with the coordinates of about several roton energies and momenta in the form of the spectrum of vortex rings. As the momentum increases, the spectrum of surface capillary waves should be transformed to the spectrum of surface vortex half-rings. 相似文献
107.
A. I. Mikaya V. G. Zaikin R. L. Ushakova L. I. Ukhova N. F. Marchenko 《Chemistry of Heterocyclic Compounds》1986,22(9):983-985
The mass spectra of the appropriate 4-ethyl derivatives, which provide the determination of the configuration of the 4 position in the initial alcohols, are registered in the chromato-mass spectrometric investigation of mixtures of the stereoisomeric 4-vinyl-trans-decahydroquinol-4-ols using a microreactor for hydrogenation; the microreactor is placed before or after the chromatographic column.Communication 13 of the series Reaction chromato-mass spectrometry. For Communication 12, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1215–1217, September, 1986 相似文献
108.
109.
A new mathematical macroscopic model is proposed to describe the nonstationary process of faceted crystal growth by the methods of directional crystallization with a slow change in external thermal conditions and low pulling rate of a cell through the growth system. The facet-growth rate is determined by the Stefan condition, integral over the face. Two boundary conditions are set for temperature: the continuity condition and the relation between the heat-flux jump and the supercooling at the facet points. The supercooling is determined by solving the entire heat problem. A facet is selected as a planar part of the phase boundary. The kinetic coefficient at the facet may depend on the supercooling. The energy conservation law is valid within the model developed. Examples of calculations of some model problems are presented. 相似文献
110.
R. S. Borisov B. V. Grinev Yu. V. Malyukin B. I. Minkov N. V. Znamenskii É. A. Manykin D. V. Marchenko E. A. Petrenko 《Journal of Experimental and Theoretical Physics》1999,88(2):385-391
The results of an experimental investigation of low-temperature optical spectra and phase relaxation of electronic excitations
of Pr3+ impurity ions in a Y2SiO5 crystal are reported. It is established that at low temperatures spectral lines are broadened by a mechanism that is uncharacteristic
for crystals and is due to the interaction of impurity ions with two-level systems. The constants characterizing the interaction
of Pr3+ impurity ions with phonons and two-level systems are found.
Zh. éksp. Teor. Fiz. 115, 704–715 (February 1999) 相似文献